Jan 17, 2019 · I want to calculate the time interval when the signal is nonzero and when it is zero. The result should be t_nonzero = [40, 10, 10, 10, ...] t_zero = [20, 10, 40, 70, ...]

Jan 5, 2017 · A popular approach: timeshift is the lag corresponding to the maximum cross-correlation coefficient. Here is how it works with an example: n = len(y1) corr = signal.correlate(y2, y1, mode='same') / np.sqrt(signal.correlate(y1, y1, mode='same')[int(n/2)] * signal.correlate(y2, y2, mode='same')[int(n/2)])

Sep 17, 2018 · I have a temperature sensor and a strain sensor, I would like to calculate the time delay between the two sensors. from scipy import signal. T1 = temperature['T1'].tolist() S1 = strain[0] time = normal_data['TIMESTAMP'].tolist() fig = plt.figure() plt.plot(time, T1, 'r') plt.plot(time, S1, 'b') shift = (np.argmax(signal.correlate(T1, S1)))

2 days ago · Sets given interval timer (one of signal.ITIMER_REAL, signal.ITIMER_VIRTUAL or signal.ITIMER_PROF) specified by which to fire after seconds (float is accepted, different from alarm()) and after that every interval seconds (if interval is non-zero).

Feb 17, 2023 · As an experiment, I tried different ways to model the received signal. Lets say I have a point scatterer at a distance $R$. I get the time delay by: $$ \tau = \frac{2R}{c} $$ where $c$ is my propagation speed.

Jan 31, 2024 · I have a dataset where a certain pattern is repeatating in different time interval. The repetation of data pattern can come with slight change. I want first find the pattern (or cycle) and later by checking autocorrelation, fft or similar strategy I filter future data.

I have two discrete signals x1 and x2 with corresponding time points t1 and t2 and I want to take the cross correlation between x1 and x2 to see if there is any similarity at a given time time shift.

Mar 15, 2020 · Python's subprocess.Popen class and signal library provide powerful ways to communicate with and send signals to a running subprocess. We'll look at at using the SIGSTOP and SIGCONT signals to pause and resume the execution of a program.

Apr 23, 2010 · Does Python have a function similar to JavaScript's setInterval()? I would like to have: def set_interval(func, interval): ... That will call func every interval time units.

In practice sampled signals are widely used. I.e., the signal is represented by \(n\) samples \(x_k := x(kT)\), \(k=0, \ldots, n-1\), where \(T\) is the sampling interval, \(\tau:=nT\) the signal’s duration and \(f_S := 1/T\) the sampling frequency.